Navicache.com XML (navicache)

This is the XML format that's used by Navicache.com for
their geocaching data. There are a number of fields in it that are
marked "required" but are Navicache-specific, so GPSBabel can not
write these files, but we can still read them.
navicache.com

noretired option

Suppress retired geocaches.

If this option is present, retired (archived) caches will be suppressed on write.